13 May '08 06:32>
Black
White
White
Originally posted by curseknightYes... therefore the previous moves cannot have been d4-d5+, e7-e5, d5xe6 e.p.+, since White cannot have played d4-d5 while his own King was in check. Therefore, the first position is illegal.
bPe7 would put wKd6 in check.
Originally posted by heinzkat"were possibly" might be useful there. Good problem, at first I could not see how en passant was possible, forgetting the pawn check.
Yes... therefore the previous moves cannot have been d4-d5+, e7-e5, d5xe6 e.p.+, since White cannot have played d4-d5 while his own King was in check. Therefore, the first position is illegal.
With the wK->d7 the previous moves can/must have been (in order to reach the position) d4-d5+, e7-e5. d4xe6 e.p.+.
I welcome better thought out explanations.
(on a sidenote, 'can have been', is there a better construction to say this?)